cpufreq: governor: Use sysfs_emit() in sysfs show functions

cpufreq: governor: Use sysfs_emit() in sysfs show functions

Replace sprintf() with sysfs_emit() in sysfs show functions.
sysfs_emit() is preferred for formatting sysfs output because it
provides safer bounds checking.  No functional changes.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
[ rjw: Subject tweak ]
Link: https://patch.msgid.link/20260223210351.344388-2-thorsten.blum@linux.dev
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>